Mammograms - come on guys - having your boobs squashed (40 pounds pressure on each one) and pumped full of radiation (1,000 times the amount in a chest xray). It doesn't check your armpits (which are also part of your breast) there are false negatives and false positives. It is one of many totally unreliable medical tests. I am 64 years old, diagnosed with Hashimotos at the age of 27 - and have never had a mammogram. I totally refuse to have them. Watchful awareness is a much better approach and if you find anything which could be cancer go for a thermogram. An ounce of prevention etc. etc. therefore; don't where underwired bras - get your bra off as much as possible, keep your weight at a sensible level (if at all possible seeing as you have a thyroid problem and doctors are no help), exercise sensibly, eat sensibly, don't smoke, don't drink to excess and stay happy.